| (19) |
 |
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(11) |
EP 4 236 483 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
11.10.2023 Bulletin 2023/41 |
| (43) |
Date of publication A2: |
|
30.08.2023 Bulletin 2023/35 |
| (22) |
Date of filing: 01.11.2013 |
|
| (51) |
International Patent Classification (IPC):
|
|
| (84) |
Designated Contracting States: |
|
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL
NO PL PT RO RS SE SI SK SM TR |
| (30) |
Priority: |
02.11.2012 US 201213667838
|
| (62) |
Application number of the earlier application in accordance with Art. 76 EPC: |
|
19163543.2 / 3522619 |
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13789954.8 / 2915385 |
| (71) |
Applicant: BlackBerry Limited |
|
Waterloo, Ontario N2K 0A7 (CA) |
|
| (72) |
Inventors: |
|
- CAI, Zhijun
Waterloo, N2K 0A7 (CA)
- ZHU, Yajun
Waterloo, N2K 0A7 (CA)
- FREEMAN, David N.
Waterloo, N2K 0A7 (CA)
- PURNADI, Rene W.
Waterloo, N2K 0A7 (CA)
|
| (74) |
Representative: Novagraaf International SA |
|
Chemin de l'Echo 3
1213 Onex, Geneva
1213 Onex, Geneva (CH) |
|
| |
|
| (54) |
WIRELESS COMMUNICATION IN HETEROGENEOUS NETWORKS |
(57) Systems, methods, and apparatuses for energy saving in heterogeneous wireless communication
networks are provided. The small cell (e.g., pico cell, relay cell, femto cell) may
adjust its transmit power based on the requirement of user equipments (UEs) in the
cell's coverage. The small cell may detect a UE entering its coverage with or without
assistance from the macro cell. An appropriate small cell may be selected to serve
the UE based on its traffic load when the UE is located in the coverage of multiple
small cells. The small cell may also transmit auxiliary synchronization signals to
reduce the association time for the UE.